Shock-absorber.



J. M. JACKSON. SHOCK ABSORBER. APPLICATION FILED FEB. 26, 1913.

Patented Feb. 3 191i WITNESSES- W ATTORNEYS JMES EEMN JACKSON, 0;?PERSBURG, WEST VIRGINIA.

SHOCK-ABSORBER.

and therefore no noise and no necessity forlubrication.

A further object of my invention is to provide an arrangement consistingsolely of spring members, the relation and relative action of which issuch as to absorb the shock of movementof awagon body in bothdirections.

With the above in mind, my invention resides in the features ofconstruction and arrangement as illustrated in the accompanying drawing,in which Fi'gure l is a sectional side elevation illustrating myimproved shock absorber in position with a full elliptical springbetween the axle and body of a wagon. Fig. 2 is a side elevationillustrating a slightly modified form of my invention in which one ofthe spring members is intwo parts for the purposes of adjustment. Fig. 3is a .-detail vertical section taken substantially on the line 33 ofFig. 1. Fig. 4 is a similar section taken through the connecting boxillustrated in Fig. 2. Fig. 5 is a perspective view of an arrangementconsisting of a modified form of my invention adapting the the same tosemi-elliptical springs.

Referring now particularly to Figs. 1 and 2, the body of a vehicle, thelower line of which is indicated at A in Fig. 1, is supported above theaxle B by means of a full elliptical spring, the upper portion G ofwhich is secured to the body by means of a clip 0, and the lower portionC of which is secured to the axle by a clip 0'.

In accordance with my invention, I provide a shock absorber comprising apair of substantially U-shaped flat spring members D and I), oppositelyor reversely disposed with relation to one another and superposed oneupon the other centrally of the elliptical body spring. The upper memberD has its upper end rigidly connected to the body of Specification ofLetters Patent.

Application filed February 26, 1913.

Patented Feb. 3, 1914. Serial No. 750,754.

the wagon or other vehicleby means of the clip 0 before mentioned, thelower member Dhas its lower end similarly connected to the axle B bymeans of the clip a.

The contiguous inner free ends of the spring members D and D, are lappedand I normally spaced from contact as shown in the figures abovementioned, each of these ends being provided with buffers 03 by whichnoise is eliminated when these ends of the spring come together. Theclips 0 and c are provided with cushions c for the same purpose, thesecushions receiving'the spring ends thereagainst when the body and theaxle B move toward one another and the spring ends coming together whenthese vehicle parts reboundaway from one another.

It is to be understood that under normal road conditions, the shockabsorbing members do not comeinto operation, the body of the Vehiclebeing supported with sufficient elasticity by means of the usual bodysprings. In order, therefore, to vary the space between the lapped freeends of the spring members, I preferably provide one of them in twoparts as particularly illustrated in Figs. 2' and 4 in which one springmember is indicated at D and the other at D the latter being in twoparts 1' having laterally projecting connected ends which are concaveand disposed within a connecting boxing 03 this boxing being providedwith set-screws d and (Z which work therethrough and into engagementwith the said ends of the spring parts in order that their relativeinclination maybe adjusted and thus the free inner end of the upper parta? may be adjusted toward and away from the free inner end of the upperspring member D In Fig. 5 I have shown a somewhat different arrangementin order to adapt my invention to use in connection with vehiclesemploying semi-elliptical springs such as indicated at E in said figure,the adjacent portion of the'body being provided with a rigid laterallyextending U-shaped bracket F and a single shock absorbing member G inthe form of a fiat U-shaped spring. This spring is connected by means ofthe clip e to the axle H, the free end of the spring being provided witha pad or battery and being disposed between the upper and lower portionsof the bracket F just mentioned.

operations, the parts being normally out of contact as in thearrangement shown in the other figures. When the body tends to move ineither direction, the'free padded end of the spring member G willcontact with the respective portion of the bracket F.

Thus from the foregoing, it will be further seen that in view of itsnoiseless operation, its simplicity of structure and the furtherfact-that the parts. are normally out of contact, either form of myimproved shock absorber possesses attributes particularly recommendingthe same to use in connection'with motor vehicles of various types. p

I claim:

1. The combination with a vehicle having a body spring, of an engagingmember hav ing spaced portions and a substantially U- shaped flat springmember secured'at one end and having its opposite free end disposedbetween the said spaced portions of the engaging member, whereby tocontact therewith in operation and to spring past the same underexcessive strain.

2. The combination with a vehicle, of a shock absorber comprisingsuperposed spring arms normally having lapped contiguous free ends outof contact and adapted to engage one another in operation, for thepurpose described.

3. The combination with a vehicle, of a shock absorber comprising a pairof spring members having lapped contiguous free ends normally spacedfrom one another, one of members having connection with the body'of thevehicle and the other member having connection with the vehicle axle.

The combination with a vehicle, of a shock absorber comprising a pair ofspring arms reversely curved with respect to one another andrespectively connected to the vehicle body and its axles, said springarms having lapped inner free ends normally spaced from contact with oneanother.

5. The combination with a vehicle, of a shock absorber, comprising apair of reversely disposed and relatively movable U- shaped fiat springmembers having lapped inner free ends in alinement and normally spacedfrom contact with one another, one

of which members is carried by the vehicle body and the other of whichis carried by the vehicle axle.

G. The combination with a vehicle, of a shock absorber comprising a pairof reversely disposed and relatively movable U- shaped flat springmembers having their contiguous ends in alinement and normally spacedfrom contact with one another, one of which members is carried by thebody and the other by the axle of the vehicle, said spring members beingadapted to engage one another upon relatively opposite movement in onedirection, and cushions carried by the vehicle body and axle and withwhich said springs are adapted to engage upon relatively oppositemovement in the other direction.

7. The combination with a vehicle, of a another and respectivelyconnected to the vehicle body and its axle, said arms having lappedcontiguous ends normally spaced from contact with one another, and meanswhereby the end of one of said spring arms may be adjusted toward andaway from the respective end of the other spring arm to vary the spacenormally existing between said contiguous ends.

8. The combination with a vehicle, of a shock absorber comprising a pairof reversely disposed and relatively movable U- shaped flat springmembers having their contiguous ends in alinement and normally spacedfrom contact with one another, one of which members is carried by thebody and the other by the axle of the vehicle, said springs beingadapted to engage one another upon relatively opposite movement in onedirection, one of said springs being in two parts having laterally bentadjacent ends, a connecting box disposed on said laterally bent ends,and set-screws Working in the box and adjustably engaging the said endsof the spring parts, for the purpose described.

JAMES MADISON JACKSON.

Witnesses A. L. NELSON,

ALBERT M. STILES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

shock absorber comprising a pair of spring I arms reversely curved withrespect to one

